summaryrefslogtreecommitdiffstats
path: root/tools/bmp2rb.c
blob: 2489ca9cdc730d7f509b8534b455fa0ae6ab0654 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by Linus Nielsen Feltzing
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
/****************************************************************************
 *
 * Converts BMP files to Rockbox bitmap format
 *
 * 1999-05-03 Linus Nielsen Feltzing
 *
 * 2005-07-06 Jens Arnold
 *            added reading of 4, 16, 24 and 32 bit bmps
 *            added 2 new target formats (playergfx and iriver 4-grey)
 *
 ****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define debugf printf

#ifdef __GNUC__
#define STRUCT_PACKED __attribute__((packed))
#else
#define STRUCT_PACKED
#pragma pack (push, 2)
#endif

struct Fileheader
{
    unsigned short Type;          /* signature - 'BM' */
    unsigned  long Size;          /* file size in bytes */
    unsigned short Reserved1;     /* 0 */
    unsigned short Reserved2;     /* 0 */
    unsigned long  OffBits;       /* offset to bitmap */
    unsigned long  StructSize;    /* size of this struct (40) */
    unsigned long  Width;         /* bmap width in pixels */
    unsigned long  Height;        /* bmap height in pixels */
    unsigned short Planes;        /* num planes - always 1 */
    unsigned short BitCount;      /* bits per pixel */
    unsigned long  Compression;   /* compression flag */
    unsigned long  SizeImage;     /* image size in bytes */
    long           XPelsPerMeter; /* horz resolution */
    long           YPelsPerMeter; /* vert resolution */
    unsigned long  ClrUsed;       /* 0 -> color table size */
    unsigned long  ClrImportant;  /* important color count */
} STRUCT_PACKED;

struct RGBQUAD
{
    unsigned char rgbBlue;
    unsigned char rgbGreen;
    unsigned char rgbRed;
    unsigned char rgbReserved;
} STRUCT_PACKED;

short readshort(void* value)
{
    unsigned char* bytes = (unsigned char*) value;
    return bytes[0] | (bytes[1] << 8);
}

int readlong(void* value)
{
    unsigned char* bytes = (unsigned char*) value;
    return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24);
}

unsigned char brightness(struct RGBQUAD color)
{
    return (3 * (unsigned int)color.rgbRed + 6 * (unsigned int)color.rgbGreen
              + (unsigned int)color.rgbBlue) / 10;
}

/****************************************************************************
 * read_bmp_file()
 *
 * Reads an uncompressed BMP file and puts the data in a 4-byte-per-pixel
 * (RGBQUAD) array. Returns 0 on success.
 *
 ***************************************************************************/

int read_bmp_file(char* filename,
                  long *get_width,  /* in pixels */
                  long *get_height, /* in pixels */
                  struct RGBQUAD **bitmap)
{
    struct Fileheader fh;
    struct RGBQUAD palette[256];

    int fd = open(filename, O_RDONLY);
    unsigned short data;
    unsigned char *bmp;
    long width, height;
    long padded_width;
    long size;
    long row, col, i;
    long numcolors, compression;
    int depth;

    if (fd == -1)
    {
        debugf("error - can't open '%s'\n", filename);
        return 1;
    }
    if (read(fd, &fh, sizeof(struct Fileheader)) !=
        sizeof(struct Fileheader))
    {
        debugf("error - can't Read Fileheader Stucture\n");
        close(fd);
        return 2;
    }
    
    compression = readlong(&fh.Compression);

    if (compression != 0)
    {
        debugf("error - Unsupported compression %ld\n", compression);
        close(fd);
        return 3;
    }

    depth = readshort(&fh.BitCount);

    if (depth <= 8)
    {
        numcolors = readlong(&fh.ClrUsed);
        if (numcolors == 0)
            numcolors = 1 << depth;

        if (read(fd, &palette[0], numcolors * sizeof(struct RGBQUAD))
           != numcolors * sizeof(struct RGBQUAD))
        {
            debugf("error - Can't read bitmap's color palette\n");
            close(fd);
            return 4;
        }
    }

    width = readlong(&fh.Width);
    height = readlong(&fh.Height);
    padded_width = (width * depth / 8 + 3) & ~3; /* aligned 4-bytes boundaries */

    size = padded_width * height; /* read this many bytes */
    bmp = (unsigned char *)malloc(size);
    *bitmap = (struct RGBQUAD *)malloc(width * height * sizeof(struct RGBQUAD));

    if ((bmp == NULL) || (*bitmap == NULL))
    {
        debugf("error - Out of memory\n");
        close(fd);
        return 5;
    }

    if (lseek(fd, (off_t)readlong(&fh.OffBits), SEEK_SET) < 0)
    {
        debugf("error - Can't seek to start of image data\n");
        close(fd);
        return 6;
    }
    if (read(fd, (unsigned char*)bmp, (long)size) != size)
    {
        debugf("error - Can't read image\n");
        close(fd);
        return 7;
    }

    close(fd);
    *get_width = width;
    *get_height = height;

    switch (depth)
    {
      case 1:
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                data = (bmp[(height - 1 - row) * padded_width + col / 8]
                        >> (~col & 7)) & 1;
                (*bitmap)[row * width + col] = palette[data];
            }
        break;

      case 4:
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                data = (bmp[(height - 1 - row) * padded_width + col / 2] 
                        >> (4 * (~col & 1))) & 0x0F;
                (*bitmap)[row * width + col] = palette[data];
            }
        break;

      case 8:
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                data = bmp[(height - 1 - row) * padded_width + col];
                (*bitmap)[row * width + col] = palette[data];
            }
        break;
        
      case 16:
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                data = readshort(&bmp[(height - 1 - row) * padded_width + 2 * col]);
                (*bitmap)[row * width + col].rgbRed =
                    ((data >> 7) & 0xF8) | ((data >> 12) & 0x07);
                (*bitmap)[row * width + col].rgbGreen =
                    ((data >> 2) & 0xF8) | ((data >> 7) & 0x07);
                (*bitmap)[row * width + col].rgbBlue =
                    ((data << 3) & 0xF8) | ((data >> 2) & 0x07);
                (*bitmap)[row * width + col].rgbReserved = 0;
            }
        break;

      case 24:
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                i = (height - 1 - row) * padded_width + 3 * col;
                (*bitmap)[row * width + col].rgbRed = bmp[i+2];
                (*bitmap)[row * width + col].rgbGreen = bmp[i+1];
                (*bitmap)[row * width + col].rgbBlue = bmp[i];
                (*bitmap)[row * width + col].rgbReserved = 0;
            }
        break;

      case 32:
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {            
                i = (height - 1 - row) * padded_width + 4 * col;
                (*bitmap)[row * width + col].rgbRed = bmp[i+2];
                (*bitmap)[row * width + col].rgbGreen = bmp[i+1];
                (*bitmap)[row * width + col].rgbBlue = bmp[i];
                (*bitmap)[row * width + col].rgbReserved = 0;
            }
        break;

      default: /* should never happen */
        debugf("error - Unsupported bitmap depth %d.\n", depth);
        return 8;
    }

    free(bmp);
    
    return 0; /* success */
}

/****************************************************************************
 * transform_bitmap()
 *
 * Transform a 4-byte-per-pixel bitmap (RGBQUAD) into one of the supported
 * destination formats
 ****************************************************************************/

int transform_bitmap(const struct RGBQUAD *src, long width, long height,
                     int format, unsigned char **dest, long *dst_width,
                     long *dst_height)
{
    long row, col;
    long dst_w, dst_h;

    switch (format)
    {
      case 0: /* Archos recorders, Ondio, Gmini 120/SP, Iriver H1x0 monochrome */
        dst_w = width;
        dst_h = (height + 7) / 8;
        break;

      case 1: /* Archos player graphics library */
        dst_w = (width + 7) / 8;
        dst_h = height;
        break;

      case 2: /* Iriver H1x0 4-grey */
        dst_w = width;
        dst_h = (height + 3) / 4;
        break;

      case 3: /* Canonical 8-bit grayscale */
        dst_w = width;
        dst_h = height;
        break;

      default: /* unknown */
        debugf("error - Undefined destination format\n");
        return 1;
    }
    
    *dest = (unsigned char *)malloc(dst_w * dst_h);
    if (*dest == NULL)
    {
        debugf("error - Out of memory.\n");
        return 2;
    }
    memset(*dest, 0, dst_w * dst_h);
    *dst_width = dst_w;
    *dst_height = dst_h;

    switch (format)
    {
      case 0: /* Archos recorders, Ondio, Gmini 120/SP, Iriver H1x0 b&w */
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                (*dest)[(row/8) * dst_w + col] |= 
                       (~brightness(src[row * width + col]) & 0x80) >> (~row & 7);
            }
        break;

      case 1: /* Archos player graphics library */
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                (*dest)[row * dst_w + (col/8)] |= 
                       (~brightness(src[row * width + col]) & 0x80) >> (col & 7);
            }
        break;

      case 2: /* Iriver H1x0 4-grey */
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                (*dest)[(row/4) * dst_w + col] |=
                       (~brightness(src[row * width + col]) & 0xC0) >> (2 * (~row & 3));
            }
        break;

      case 3: /* Canonical 8-bit grayscale */
        for (row = 0; row < height; row++)
            for (col = 0; col < width; col++)
            {
                (*dest)[row * dst_w + col] = brightness(src[row * width + col]);
            }
        break;
    }
    
    return 0;
}

/****************************************************************************
 * generate_c_source()
 *
 * Outputs a C source code with the bitmap in an array, accompanied by
 * some #define's
 ****************************************************************************/

void generate_c_source(char *id, long width, long height,
                       const unsigned char *t_bitmap, long t_width,
                       long t_height)
{
    FILE *f;
    long i, a;

    f = stdout;

    if (!id || !id[0])
        id = "bitmap";

    fprintf(f,
            "#define BMPHEIGHT_%s %ld\n"
            "#define BMPWIDTH_%s %ld\n"
            "const unsigned char %s[] = {\n",
            id, height, id, width, id);

    for (i = 0; i < t_height; i++)
    {
        for (a = 0; a < t_width; a++)
            fprintf(f, "0x%02x,%c", t_bitmap[i * t_width + a],
                    (a + 1) % 13 ? ' ' : '\n');
        fprintf(f, "\n");
    }

    fprintf(f, "\n};\n");
}

/****************************************************************************
 * generate_ascii()
 *
 * Outputs an ascii picture of the bitmap
 ****************************************************************************/

void generate_ascii(long width, long height, struct RGBQUAD *bitmap)
{
    FILE *f;
    long x, y;

    f = stdout;

    /* for screen output debugging */
    for (y = 0; y < height; y++)
    {
        for (x = 0; x < width; x++)
        {
            fprintf(f, (brightness(bitmap[y * width + x]) & 0x80) ? " " : "*");
        }
        fprintf(f, "\n");
    }
}

void print_usage(void)
{
    printf("Usage: %s [-i <id>] [-a] <bitmap file>\n"
           "\t-i <id>  Bitmap name (default is filename without extension)\n"
           "\t-a       Show ascii picture of bitmap\n"
           "\t-f <n>   Generate destination format n, default = 0\n"
           "\t         0  Archos recorder, Ondio, Gmini 120/SP, Iriver H1x0 mono\n"
           "\t         1  Archos player graphics library\n"
           "\t         2  Iriver H1x0 4-grey\n"
           "\t         3  Canonical 8-bit grayscale\n"
           , APPLICATION_NAME);
    printf("build date: " __DATE__ "\n\n");
}

int main(int argc, char **argv)
{
    char *bmp_filename = NULL;
    char *id = NULL;
    int i;
    int ascii = false;
    int format = 0;
    struct RGBQUAD *bitmap = NULL;
    unsigned char *t_bitmap = NULL;
    long width, height;
    long t_width, t_height;


    for (i = 1;i < argc;i++)
    {
        if (argv[i][0] == '-')
        {
            switch (argv[i][1])
            {
              case 'i':   /* ID */
                if (argv[i][2])
                {
                    id = &argv[i][2];
                }
                else if (argc > i+1)
                {
                    id = argv[i+1];
                    i++;
                }
                else
                {
                    print_usage();
                    exit(1);
                }
                break;

              case 'a':   /* Ascii art */
                ascii = true;
                break;
                
              case 'f':
                if (argv[i][2])
                {
                    format = atoi(&argv[i][2]);
                }
                else if (argc > i+1)
                {
                    format = atoi(argv[i+1]);
                    i++;
                }
                else
                {
                    print_usage();
                    exit(1);
                }
                break;

              default:
                print_usage();
                exit(1);
                break;
            }
        }
        else
        {
            if (!bmp_filename)
            {
                bmp_filename = argv[i];
            }
            else
            {
                print_usage();
                exit(1);
            }
        }
    }

    if (!bmp_filename)
    {
        print_usage();
        exit(1);
    }

    if (!id)
    {
        char *ptr=strrchr(bmp_filename, '/');
        if (ptr)
            ptr++;
        else
            ptr = bmp_filename;
        id = strdup(ptr);
        for (i = 0; id[i]; i++)
            if (id[i] == '.')
                id[i] = '\0';
    }

    if (read_bmp_file(bmp_filename, &width, &height, &bitmap))
        exit(1);
        

    if (ascii)
    {
        generate_ascii(width, height, bitmap);
    }
    else
    {
        if (transform_bitmap(bitmap, width, height, format, &t_bitmap,
                             &t_width, &t_height))
            exit(1);
        generate_c_source(id, width, height, t_bitmap, t_width, t_height);
    }

    return 0;
}